<?php
/**
 * values-processor.php
 *
 * This file implements the processor for the VALUES statements.
 *
 * Copyright (c) 2010-2012, Justin Swanhart
 * with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
if (!defined('HAVE_VALUES_PROCESSOR')) {
    
    require_once(dirname(__FILE__) . '/../expression-types.php');
    require_once(dirname(__FILE__) . '/record-processor.php');
    require_once(dirname(__FILE__) . '/abstract-processor.php');

    /**
     * 
     * This class processes the VALUES statements.
     * 
     * @author arothe
     * 
     */
    class ValuesProcessor extends AbstractProcessor {

        private $recordProcessor;

        public function __construct() {
            $this->recordProcessor = new RecordProcessor();
        }

        public function process($tokens) {
            $unparsed = "";
            foreach ($tokens['VALUES'] as $k => $v) {
                if ($this->isWhitespaceToken($v)) {
                    continue;
                }
                $unparsed .= $v;
            }

            $values = $this->splitSQLIntoTokens($unparsed);

            $parsed = array();
            foreach ($values as $k => $v) {
                if ($this->isCommaToken($v)) {
                    unset($values[$k]);
                } else {
                    $processor = new RecordProcessor();
                    $values[$k] = array('expr_type' => ExpressionType::RECORD, 'base_expr' => $v,
                                        'data' => $this->recordProcessor->process($v));
                }
            }

            $tokens['VALUES'] = array_values($values);
            return $tokens;
        }

    }

    define('HAVE_VALUES_PROCESSOR', 1);
}

